KR102588829B1 - Robot brazing device capable of brazing various types of heat exchangers - Google Patents

Abstract

The present invention relates to a robot brazing device capable of brazing various types of heat exchangers that can automatically braze various types of small, medium, and large models and heat exchangers with high specifications of the end plate setting height. The brazing torch unit (30) Torches (31) (31') are arranged in 10 rows of 10 at an inclination angle of 20 degrees, and the 2nd, 4th, 6th, 8th, and 10th rows are selectively selected by the main controller (C) depending on the type of heat exchanger (100). brazing is done under the same temperature conditions in the longitudinal direction while weaving in the left and right directions as much as the brazing width of the heat exchanger (100), and the cooling water of the water cooler (40) is circulated in the brazing torch part (30) to create a torch (31). It is characterized in that the temperature of (31') can be controlled while cooling.

Description

Robot brazing device capable of brazing various types of heat exchangers}

The present invention relates to a robot brazing device capable of brazing various types of heat exchangers that can automatically braze various types of small, medium, and large models and heat exchangers with high specifications of the end plate setting height. More specifically, it relates to a robot brazing device capable of brazing multiple types of heat exchangers. By combining a water-cooled brazing torch unit with multiple torches arranged in multiple rows at the tip of the robot hand, the flame torch of the brazing torch unit can be selectively controlled depending on the type of heat exchanger and weaved left and right in response to the width of the brazing area in the longitudinal direction. It relates to a robot brazing device that enables brazing and automatically adjusts the intensity of the flame through quantitative gas control of the mixed gas supplied to the flame torch, thereby reducing the consumption of mixed gas and minimizing the brazing defect rate.

In general, brazing is a technology that uses a filler metal with a liquidus temperature of 450℃ or higher and joins two base materials by applying heat below the solidus temperature of the base metal. Depending on the heating method, the method is torch brazing, furnace brazing, induction brazing, etc. There is immersion brazing, etc., and the torch brazing applied to the present invention can be easily brazed by using various gases such as acetylene, natural gas, propane, hydrogen, and mixed gas as a heat source. The tip of the joint surface is about 12-24 mm. It is appropriate to heat from a distance. When heating, it must be heated consistently from front to back, left to right, etc.. After the base metal reaches the brazing temperature, the flame of the torch is moved back slightly and the flux is accurately injected into the joint surface. At this time, the flux completely penetrates the joint surface. It should be noted that it always flows toward the more heated side. After the flux has completely penetrated, a little additional heat is added to ensure that the base material and the flux are completely combined. If the flux penetrates but is not completely combined, the bonding strength will significantly decrease. You should take note of this.

When brazing a heat exchanger using the torch brazing described above, a brazing device is required that is easy to respond to the specifications of the heat exchanger, that is, the size and shape of the heat exchanger, and that does not limit the brazing operation even when the set height of the end plate of the heat exchanger is high. There is a situation.

Prior technologies related to conventional brazing devices for heat exchangers include Registered Patent Publication No. 10-0817850 (Automatic brazing device for heat exchangers), Registered Patent Publication No. 10-1148932 (Automatic brazing device for aluminum heat exchangers and its method), and Registered Patent Publication No. 10-1148932 (Automatic brazing device for aluminum heat exchangers and its method). Shinan Publication No. 20-0388079 (automatic brazing device for heat exchanger) was presented.

The first registered patent is to form a left and right transport guide on the other side of the body with a vertical feed support on one side, form a side frame to support both sides of the body, and form an upper frame on the upper part of the side frame. A vertical transfer part is formed that is coupled to the vertical transfer support, and a left and right transfer support unit is formed on the other side of the body to form a left and right transfer part and a fixed body that is connected to the left and right transfer guides of the body with a guide groove, and the upper part of the fixed body is formed. Filler metal is supplied to both sides of the brazing body, which has a forward and backward transfer part that is connected to the front and rear transfer part of the brazing fixing part and the front and rear transfer part of the fixed body of the brazing fixing part on the upper part of the front and rear transfer rail equipped with the front and rear transfer guide. A torch is installed on the other side of the brazing body of the brazing section and the brazing section, which forms a filler material supply roller that supplies by driving, a rotating part that rotates to the center of the fixed body, and a gas supply block that supplies gas to one side of the fixed body. It is a structure that includes a torch part forming a fixed body and a control part forming a central control operation part that controls the operation of the body part and controls the gas of the gas control supply unit connected to the gas supply block.

The second registered patent includes a transfer unit for transporting a heat exchanger joined by brazing, a brazing body formed on one side of the transfer unit, a brazing frame having a plurality of heating fixtures on the front and sides of the brazing body, and an upper part of the heating fixture. It is fixed to the brazing section, the control section that controls the operation of the transfer section and the operation of the brazing section and the supply of gas, and the brazing section, which are formed by a plurality of brazing pipes equipped with a brazing nozzle through which the gas supplied from the brazing distribution tank is located. It is a structure that includes a cooling part that supplies cooling air and installs a rectangular tip at the gas injection position where the flame ignited from the brazing nozzle is emitted, thereby spraying the emitted flame in a rectangular shape to locally heat the heat exchanger.

The third registered utility model operates by installing a conveyor line on the upper part of the base frame and connecting the driving sprocket with a transfer motor. Heat exchanger guide bars are installed on the left and right sides of the inlet and outlet parts of the conveyor line, and a brazing frame is installed in the center of the base frame. Install the flame torch and guide parts on the upper and lower parts, and connect the top of the arm to each guide rail to operate forward and backward by a manual handle and forward and backward motors, and the brazing unit is equipped with a flame torch and guide parts. It is a structure in which the upper frame of the housing is coupled to a ball screw so that it can be raised and lowered by a lifting motor.

The first registered patent allows the brazing part to move up and down and left and right in the body part, and the torch part of the brazing part can move back and forth, rotate and move up and down, thereby brazing a heat exchanger with two torch parts and a filler material supply port, which has a mechanical structure. Because it operates 5 axes to correspond to a heat exchanger, the structure is complex and the work space occupancy rate is high, which reduces space utilization rate, and because the heat exchanger is brazed with two torches, processing time is delayed.

The second registered patent is a structure in which the brazing part of the brazing body is adjusted up and down according to the size of the heat exchanger transported on the conveyor, and brazing is done with brazing nozzles on both sides of the heat exchanger. The height can be adjusted depending on the size of the heat exchanger, but large The heat exchanger cannot be brazed, and the location of the brazing nozzle radiates flame from the left and right sides of the heat exchanger. Therefore, if the width of the heat exchanger is wide, the emitted flame does not travel to the inside and a uniform temperature cannot be maintained, so it is only applicable to small heat exchangers. There is a problem in applying various types of heat exchangers as a possible brazing device.

The third registered utility model is to braze the heat exchanger by installing a brazing frame on the conveyor through which the heat exchanger is transported, and installing flame torches on both left and right sides of the brazing frame to enable up and down movement and left and right adjustment, thereby reducing space occupancy by installing the brazing frame. Since the flame is high and radiates from both sides of the heat exchanger, if the width of the heat exchanger is wide, the radiated flame is not transmitted to the inside, making it impossible to maintain a uniform temperature, and if the end plate setting height is high, it is not applicable, etc. .

Therefore, the present invention was created for the purpose of solving the above-described conventional problems, by combining a robot hand capable of multi-axis adjustment with a brazing torch unit arranged in multiple rows forming a certain inclination angle to determine the type and size of the heat exchanger. It is possible to respond to various forms such as shape, and the temperature of the brazing torch can be controlled by water cooling to perform brazing welding continuously. During brazing welding, brazing is performed longitudinally by weaving from side to side in response to the width of the brazing area of the heat exchanger. This minimizes the brazing defect rate by emitting flame at the same temperature to the entire brazing area, selectively controls the flame torch of the brazing torch part according to the heat exchanger, and quantitatively controls the mixed gas supplied to the flame torch to automatically adjust the intensity of the flame. It was possible to provide a robot brazing device capable of brazing multiple types of heat exchangers that can reduce mixed gas consumption by adjusting .

In the present invention, the torches of the brazing torch part are arranged in 10 rows of 10 at an inclination angle of 20 degrees, so that the 2nd, 4th, 6th, 8th, and 10th rows can be selectively controlled by the main controller depending on the type of heat exchanger, and heat exchanger is performed. Brazing is performed under the same temperature conditions in the longitudinal direction while weaving in the left and right directions as much as the brazing width of the machine, and the temperature of the torch can be cooled and controlled by circulating coolant from a water cooler in the brazing torch part.

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Therefore, the present invention enables brazing not only for small, medium, and large types of heat exchangers, but also when the set height of the end plate is high, and uses a torch arranged in multiple rows of brazing torches mounted on a robot hand capable of multi-axis adjustment at an inclination angle. By cooling it with water cooling while forming it, the temperature of the brazing torch part is kept constant to provide continuity of brazing welding. When the flame is radiated to the brazing torch part, the defect rate can be minimized by brazing in the longitudinal direction while weaving left and right. Depending on the type and size of the heat exchanger, the flame torches of the brazing torch are selectively controlled from 2 to 10 rows, and the mixed gas supplied to the flame torch is quantitatively controlled to automatically adjust the intensity of the flame to reduce mixed gas consumption. It has the effect of reducing costs.

1 is a front structural conceptual diagram showing the overall structure of the present invention.
Figure 2 is a planar structural conceptual diagram showing the overall structure of the present invention.
Figure 3 is a side structural conceptual diagram showing the overall structure of the present invention.
Figure 4 is a front structural diagram of the brazing torch part of the present invention.
Figure 5 is a plan view of the brazing torch portion of the present invention.
Figure 6 is a side structural diagram of the brazing torch part of the present invention.

Hereinafter, the gist of the invention will be described in detail by linking it to the attached drawings, and the structure and operation will be described in detail as follows.
Figures 1, 2, and 3 are conceptual diagrams of the front, plan, and side structures showing the overall structure of the present invention. By installing the brazing torch on the robot hand and adjusting the multiple axes of the robot by the robot controller, models with various heights and widths of the heat exchanger are created. It shows a structure that enables water-cooled cooling of the flame torch and quantitative gas control of the mixed gas by a water cooler, gas tank, and main controller. Figures 4, 5, and 6 show the front of the brazing torch part of the present invention. ,The plan and side structure diagram shows a structure in which the flame torch is composed of 10 rows, forms an inclination angle of 20 degrees, and can be selectively controlled from the 2nd row to the 10th row.

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The brazing torch unit 30, in which a plurality of torches 31 and 31' are inclined in multiple rows, is coupled to the tip of the hand 21 of the robot 20, the multi-axis of which is controlled by the robot controller 10, and the torch 31 ) The mixed gas that is supplied to (31') to emit a flame enables quantitative gas control control in the gas tank (50), and the robot controller (10), water cooler (40), and gas tank (50) are the main controller ( In the robot brazing device (B) for automatically brazing the heat exchanger (100) of various small, medium and large models and specifications with a high set height of the end plate by enabling control from C),

The torches 31 and 31' of the brazing torch unit 30 are arranged in 10 rows of 10 at an inclination angle of 20 degrees, forming 2 rows, 4 rows, 6 rows, 8 rows and 10 rows depending on the model of the heat exchanger 100. It can be selectively controlled by the main controller (C) and brazed under the same temperature conditions in the longitudinal direction while weaving in the left and right directions as much as the brazing width of the heat exchanger (100). The brazing torch part (30) is equipped with a water cooler (40). By circulating cooling water, the temperature of the torch 31 (31') could be cooled and controlled.

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The unexplained reference numeral 60 in the drawing is a heat exchanger stand.

This invention combines a multi-axis adjustable robot hand with a water-cooled brazing torch unit arranged in 10 rows of 10 torches forming an inclination angle of 20 degrees, so that heat exchangers can be used in small, medium and large models with different heights and widths. Brazing is possible even when the set height of the end plate is high, and brazing welding can be performed continuously by controlling the temperature of the brazing torch with coolant from the water cooler. By allowing brazing in the longitudinal direction while weaving, the brazing defect rate is minimized by emitting flame at the same temperature to the entire brazing area. The flame torch of the brazing torch is selectively controlled from 2 to 10 rows according to the heat exchanger, and the flame torch supplied to the flame torch is controlled selectively. It was possible to provide a robot brazing device capable of brazing multiple types of heat exchangers that can reduce mixed gas consumption by quantitatively controlling the mixed gas and automatically adjusting the intensity of the flame.

As shown in Figures 1 to 6, the present invention is cooled by the coolant of the robot 20 and the water cooler 40, the multi-axis of which is controlled by the robot controller 10, and mixed by quantitative gas control in the gas tank 50. It consists of a brazing torch unit 30 that controls gas, and the torches 31 and 31' of the brazing torch unit 30 are arranged in 10 rows of 10 at an inclination angle of 20 degrees, and the main controller ( It can be selectively controlled by C).

The hand 21 of the robot 20 is equipped with a brazing torch unit 30 equipped with torches 31 and 31' arranged in 10 rows of 10 each and having an inclination angle of 20 degrees.

The robot 20 adjusts multiple axes by the robot controller 10 and uses the torch ( 31) (31') can be controlled at various angles and directions toward the heat exchanger 100, making it possible to prepare for brazing welding not only in the downward posture, but also in the upward posture, lateral posture, and inclined angle posture.

When brazing welding is performed with the torches 31 and 31' of the brazing torch unit 30 prepared as above, the torch is heated with the coolant of the water cooler 40 to cool the heated torches 31 and 31'. (31) (31') is cooled by water cooling, so brazing welding can be performed without interruption due to overheating, and the mixed gas from the gas tank (50) is supplied through quantitative gas control to emit flame, so the intensity of the flame is automatically adjusted. By adjusting this, the mixed gas consumption can be reduced.

At this time, when the flame is emitted with the torch (31) (31'), brazing is performed in the longitudinal direction while weaving in the left and right directions as much as the width of the brazing area of the heat exchanger (100) under the control of the robot controller (10) to braze under the same temperature conditions. This makes it possible to improve the precision of brazing welding and brazing quality.

The torches 31 (31') of the brazing torch unit 30 for brazing the heat exchanger 100 are installed at an angle of 20 degrees as shown in FIG. 6, so that when the torches 31 (31') emit flame, the flame By preventing reflection from the heat exchanger 100 to the brazing torch unit 30, brazing can be performed while minimizing heating of the brazing torch unit 30.

In addition, the torches 31 and 31' of the brazing torch unit 30, which are arranged at an angle in 10 rows of 10, are arranged in 2, 4, and 6 rows from the center depending on the type of heat exchanger 100, such as small, medium, and large. , It is possible to perform brazing work by selectively determining the 8th and 10th rows, and easily responds to changes in the width and height of the heat exchanger (100). Even if the set height of the end plate is high, the robot brazing device (B) moves downward. By brazing in this position, brazing and welding of various types of heat exchangers 100 can be performed without restrictions.

The robot controller 10, water cooler 40, and gas tank 50 enable integrated automatic control from the main controller (C) according to various types and specifications of the heat exchanger (100).

In addition, the transfer speed of the conveyor and the control speed of the robot controller 10 are synchronized so that brazing can be performed by replacing the fixed stand 60 on which the heat exchanger 100 is loaded with a conveyor (not shown), so that the brazing torch unit (30) Automatic brazing is also possible.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the invention as claimed in the claims. and such changes are within the scope of the claims.

10: robot controller 20: robot
21: Hand 30: Brazing torch part
31,31': Torch 40: Water cooler
50: gas tank 100: heat exchanger
B: Robot brazing device C: Main controller

Claims (3)

The brazing torch unit 30, in which a plurality of torches 31 and 31' are inclined in multiple rows, is coupled to the tip of the hand 21 of the robot 20, the multi-axis of which is controlled by the robot controller 10, and the torch 31 ) The mixed gas that is supplied to (31') to emit a flame enables quantitative gas control control in the gas tank (50), and the robot controller (10), water cooler (40), and gas tank (50) are the main controller ( In the robot brazing device (B) for automatically brazing the heat exchanger (100) of various small, medium and large models and specifications with a high set height of the end plate by enabling control from C),
The torches 31 and 31' of the brazing torch unit 30 are arranged in 10 rows of 10 at an inclination angle of 20 degrees, forming 2 rows, 4 rows, 6 rows, 8 rows and 10 rows depending on the model of the heat exchanger 100. It can be selectively controlled by the main controller (C) and brazed under the same temperature conditions in the longitudinal direction while weaving in the left and right directions as much as the brazing width of the heat exchanger (100). The brazing torch part (30) is equipped with a water cooler (40). A robot brazing device capable of brazing multiple types of heat exchangers, characterized in that the temperature of the torches (31) (31') can be cooled and controlled by circulating coolant. delete delete